Debian DLA-2486-1 : xorg-server security update

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-2486-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(144022);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/02/02");

  script_cve_id("CVE-2020-14360", "CVE-2020-25712");

  script_name(english:"Debian DLA-2486-1 : xorg-server security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"Jan-Niklas Sohn discovered that the XKB extension of the Xorg X server
performed incomplete input validation, which could result in privilege
escalation.

For Debian 9 stretch, these problems have been fixed in version
2:1.19.2-1+deb9u7.

We recommend that you upgrade your xorg-server packages.

For the detailed security status of xorg-server please refer to its
security tracker page at:
https://security-tracker.debian.org/tracker/xorg-server

NOTE: Tenable Network Security has extracted the preceding description
block directly from the DLA security advisory. Tenable has attempted
to automatically clean and format it as much as possible without
introducing additional issues.");
  script_set_attribute(attribute:"see_also", value:"https://lists.debian.org/debian-lts-announce/2020/12/msg00012.html");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/stretch/xorg-server");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/xorg-server");
  script_set_attribute(attribute:"solution", value:
"Upgrade the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-14360");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2020-25712");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/12/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/12/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/12/10");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xdmx");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xdmx-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xnest");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xorg-server-source");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xserver-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xserver-xephyr");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xserver-xorg-core");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xserver-xorg-core-udeb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xserver-xorg-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xserver-xorg-legacy");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xvfb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xwayland");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Debian Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2020-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"9.0", prefix:"xdmx", reference:"2:1.19.2-1+deb9u7")) flag++;
if (deb_check(release:"9.0", prefix:"xdmx-tools", reference:"2:1.19.2-1+deb9u7")) flag++;
if (deb_check(release:"9.0", prefix:"xnest", reference:"2:1.19.2-1+deb9u7")) flag++;
if (deb_check(release:"9.0", prefix:"xorg-server-source", reference:"2:1.19.2-1+deb9u7")) flag++;
if (deb_check(release:"9.0", prefix:"xserver-common", reference:"2:1.19.2-1+deb9u7")) flag++;
if (deb_check(release:"9.0", prefix:"xserver-xephyr", reference:"2:1.19.2-1+deb9u7")) flag++;
if (deb_check(release:"9.0", prefix:"xserver-xorg-core", reference:"2:1.19.2-1+deb9u7")) flag++;
if (deb_check(release:"9.0", prefix:"xserver-xorg-core-udeb", reference:"2:1.19.2-1+deb9u7")) flag++;
if (deb_check(release:"9.0", prefix:"xserver-xorg-dev", reference:"2:1.19.2-1+deb9u7")) flag++;
if (deb_check(release:"9.0", prefix:"xserver-xorg-legacy", reference:"2:1.19.2-1+deb9u7")) flag++;
if (deb_check(release:"9.0", prefix:"xvfb", reference:"2:1.19.2-1+deb9u7")) flag++;
if (deb_check(release:"9.0", prefix:"xwayland", reference:"2:1.19.2-1+deb9u7")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");